What does a convex lens do to light, and what applications can be expanded by using it

1. The convex lens has a concentrating effect on the light, while the concave lens has a divergent effect on the light; Convex mirrors have a divergent effect on light, and concave mirrors have a converging effect on light.

2. Convex lenses are made according to the principle of refraction of light. Convex lenses are partially thicker lenses. Convex lenses are divided into biconvex, plano-convex and concave-convex (or meniscus-shaped) and other forms, thin convex lenses have a convergence effect, so they are also called condenser lenses, and thicker convex lenses are expected to be far away, converging and other effects.

Convex lenses can make light converge, concave lenses can diverge light, and the direction of light propagation through the center of light remains unchanged.

Convex lenses make light light (convergence) and concave lenses make light light divergence

aThe light emitted from the focal point can only become a parallel light after passing through the convex lens, so it is false; d is wrong: the rays refracted through the convex lens may be parallel beams, or they may still be divergent beams, but they are somewhat more converging than the incident rays.

The convex lens has a converging effect on any light, so B is wrong, C is right;

The answer is c

For a convex lens, it has a focal point on the left and right sides. Both of these foci are solid foci. Actual light is converging.

For a concave lens, it has a focal point on the left and right sides. Both of these foci are imaginary foci. It is not formed by the convergence of actual light.

Convex lenses are made according to the principle of refraction of light. Convex lenses are thicker lenses with thinner edges. Convex lenses are divided into the forms of double convex, plano-convex and concave and convex (or positive meniscus), convex lenses have the effect of converging rays, so they are also called converging lenses, and thicker convex lenses are expected to be far away, converging and other effects, which are related to the thickness of the lens.

Farsighted glasses are convex lenses.

A convex lens is made according to the principle of reflection of light, which is able to reflect, refract, and transmit light, so that light passes through the convex lens to form a focus or diffusion.

When a point light source is placed at the "focus" of the convex lens, the light emitted by the light source towards the convex lens becomes a ray "parallel to the main optical axis" after passing through the convex lens.

Convex lens: a lens that is thicker in the middle than the edge;

How a lens works: the refraction of light.

The focal point of the convex lens: The light rays parallel to the main optical axis, after being refracted by the convex lens, will converge to a point on the main optical axis, which is called the "focus" of the convex lens. According to the principle of reversibility of the refracted time path, when the light is emitted from the focal position, or passes through the focal point, the refracted light will shoot out parallel to the main optical axis.

The optical path diagram is as follows: